insistence vs imperativeness

insistence and imperativeness both are nouns.

Word	Noun	Adjective	Verb	Adverb
insistence	Yes	No	No	No
imperativeness	Yes	No	No	No

As nouns, insistence and imperativeness are synonyms defined as:

insistence and imperativeness: the state of demanding notice or attention

Other synonyms of insistence include insistency, press, pressure.

insistence (noun)	imperativeness (noun)
the act of insisting on something	the quality of being insistent
continual and persistent demands	the state of demanding notice or attention
the state of demanding notice or attention